Designation:C612−14StandardSpecificationforMineralFiberBlockandBoardThermalInsulation1ThisstandardisissuedunderthefixeddesignationC612;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoverstheclassification,composition,dimension,andphysicalpropertiesofmineralfiber(rock,slag,orglass)semi-rigidandrigidboardintendedfortheuseasthermalinsulationonsurfacesoperatingattemperaturesbe-tween0°F(-18°C)and1800°F(982°C).Forspecificapplications,theactualtemperaturelimitsshallbeagreeduponbetweenthesupplierandthepurchaser.1.2Forsatisfactoryperformance,properlyinstalledprotec-tivevaporretarderorbarriersshallbeusedonbelowambienttemperatureapplicationstoreducemovementofwaterthroughoraroundtheinsulationtowardsthecoldersurface.Failuretouseavaporretarderorbarriercanleadtoinsulationandsystemdamage.RefertoPracticeC921toaidmaterialselection.Althoughvaporretarderpropertiesarenotpartofthisspecification,propertiesrequiredinSpecificationC1136arepertinenttoapplicationsorperformance.1.3Theorientationofthefiberswithintheboardsisprimarilyparalleltotheprincipalsurface(face).Thisspecifi-cationdoesnotcoverfabricatedpipeandtankwrapinsulationwheretheinsulationhasbeencutandfabricatedtoprovideafiberorientationthatisperpendiculartothesurface(face).1.4Thisstandarddoesnotpurporttoprovidetheperfor-mancerequirementsofhourly-ratedfiresystems.Consultthemanufacturerfortheappropriatesystem.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoest...
